Cheaplabor
Well-Known Member
My O4 Ranger has been having a knock/rattle sound comming from the 4.0 engine and cant figure it out. I have searched and found that they get the timing chain rattle at 2000-3000 RMP but this happens light at idle and 3-4 loud as i come to a stop and the RPMs drop between 1500 and idle. It sounded like belt tentioner was rattling but replace it and idler and no change. I removed the belt and started and can still hear light rattle. Any ideas would help.